Method of making insoles.



G. L. PREBLE.

METHOD 0F MAKING INSOLES.

APPLICATION FILED N0v.17, 1910.

1,022,391 Patented Apr. 2, 1912.

GEORGE L. PREBLE, F LYNN, MASSACHUSETTS.

METHOB 0F MAKING INSOLES.

Specification of Letters Patent.

Application filed November 17, 1910. Serial No. 592,823.

Patented Api. 2, 1912.

To all whom t mayconcem:

Be it known that I, GEORGE L. Panama, of Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Methods of Making Insoles, of which the following is a specication.

This invention relates to insoles of the type which comprises a plurality of layers,

one of which is composed of textile material which is formed with a crease or rib to receive the stitches by which the pulled-over portion of an upper is attached. Hitherto, 1n soles of this type the layer of textile material has been joined with anotherlayer of any suitable material, such as leather, by

means of cement; but insoles depending upon cement for joining the layers are not satisfactory, because the insole is oftentimes subjected to strains which apart, the cement being lnsuilicient for standing the strain. The present invention overcomes this weakness in the' joining of the layers, by uniting the layer of textile material with a layer of Celluloid while the exterior of the Celluloid is in a liquid 4condition, and vpressing the two layers together while the Celluloid is in a li uid condition, `so that the liquid Celluloid is orced into the interstices of the, textile material. When the Celluloid becomes hard it is interlocked and clings so tenaciously to the textile material that it is impossible to separate the layers without dissolving the Celluloid. The

Celluloid acts, therefore, to positively hold the textile material in its original Condition, thus preserving the formation of the stitchreceiving rib with sutiicient strength to withstand any strain to which the shoe is ordi# .that the textile material and the reinforc;

ing strip are interlocked in this way with the layer of Celluloid positively insures the preservation of the stitch-receiving rib and the reinforcin strip intact.

The Celluloid, in addition to the functions pull the layers stated, renders the sole waterproof and moisture proof. It does not, however, render the sole unduly stiff, because the Celluloid is sufficiently flexible. Other elements may be added to those described, as, for exam le, .a separate sock lining and a shanksti ening member. For some purposes, however, the layerof Celluloid is a suitable sock lining. If a separate sock lining is added, it may be joined with the Celluloid in the same manner as that by which the textile material is joined, the separate sock lining being, of Course, placed upon the opposite side of the cellulold with relation to the textile material. When a shank-stifl'ening member is added, it is preferably interposed between the sock linin and the Celluloid, and the Confronting aces of the shank' stifl'ening member and sock lining are preferably coated with cement. When 4the shank-stifl'ening member is used, it, also, is preferably joined with the Celluloid in the manner explained.

Of the accompanying drawings which illustrate theV construction of an insoleand the method of assembling the various mem- `bers according to the present invention:

Figure v1 represents `a plan View of an insole as seen. from the side of the textile material. Fig. 2 re resents a section on line 2 2 of Fig. 1. ig. 3 represents a cross section showing tl-e several members assembled upon a grooved bed prior to being pressed together. Fig. 4 represents a plan view of the bed, with a layer of textile material laid thereon and a flexible reinforcing strip laid upon the textile material. Fig. 5 re resents a perspective view of a fragment o an insole Comprising a layer of textile material and a layer of Celluloid. Fig. 6 represents a cross section of the various members included in F ig.V 3, after being pressed together. Fig. 7 represents a cross section, on a relatively large scale, of one edge of a completed sole. tudinal section of the shank portion of an insole having a shank stiffener introduced between the layer of Celluloid and theattached sock lining.

The same reference characters indicate the.

same parts wherever they occur.

The essential elements of the invention are a layer of textile material 10such as canvas, duck, buckram, or other flexible material, and a layer of Celluloid 11. These two lay- 'ers may be suflcient to constitute an insole 1(7)0 Fig. 8 represents a longiwhen they are properly united, provided the textile material is formed with a crease or rib to receive stitches. If no other element is added, the celluloid may serve as a sock lining. Itfis usually desirable, however, to provide. a separate sock lining,

which may be composed of any suitable ma terial, such as leather, felt, or woven fabric. When a separate sock lining is added, it .is placed upon the opposite side of the celluloid with relation to the layer 10.

As shown by Figf'?, a separate sock liningis indicated at 12. When assembling the layers 10, 11 and 12, the layerlO is first formed to afforda stitch-receiving rib 13. A convenient manner of forming the rib 13 is to lay the layer of textile material on a bed such as that indicated at 14, saidv bed being provided with a groove 15 in its workengaging surface. The configuration of the y groove 15 vis substantially theV same as that shown by thereinforcing strip 13 in Fig. 4. The textile material may be impressed in'to the, groove 15, and if a reinforcing strip 13 is to be usedthe said strip will also be imapplied to one side only of the layer of Icelluloid. The action of the solvent reduces the celluloid to a liquid condition, when it isV adapted tc permeate the fibers of the textile fabric and the reinforcing strip. F That side of the celluloid which is rendered liquid is laidupon the textile material and then pressed. `against the textile material with pressure sufficient to force the liquid cellu- A loid into the textile material, between the I fibers rnd strands thereof.

v ressing member 17v adapted to coperate with the bed 14 Vto press Fig-6 illustrates a p the two layers together. If a fibrous reinforcingfstrip, such as a cord,'is contained in the rib113", it too becomes permeated by the liquid celluloid When the celluloid becomes.hard, the textile material and the' reinforcing strip become firmly interlocked with it, Vsol that it is substantially impossible to separate the several members without dissolving the celluloid. .The merging of the celluloid with the ,textile material and with the reinforcing strip is represented inY aconventional mannerby Fig. 7. This figure also includes a separate sock lining 12 with lwhich the celluloid isalso merged.

',As shown by Fig. 8, a shank-stiening member 16 is interposed between theisock lining v12. and the celluloid. The.confront Vin said crease.

ing faces of the sock lining 12 and the shank-stiffening member are preferably coated with cement, while the celluloid is merged` with the opposite face of the shankstiffening member as explained.

I believe that it .is broadly new to combine with the layer 10 of an insole a layer of celluloid and to dissolve the celluloid sufficiently to reduce its exterior to a liquid condition and press the two layers together so that the celluloid becomes interlocked directlywith the textile material. I think it? also broadly new to cause the celluloid to be interlocked directly with the reinforcing strip 13, The reinforcingv strip is not only thus directly connected with the celluloid, but it is held in position by the layer 10 which also is interlocked directly. with the celluloid.

1. The herein described method of making an insole, which consists in liquefying one side of a layer of celluloid, forming a layer of textile material with a st'tch-receiving rib, and pressing the'y liquefied side of the celluloid against the textile material to cause the liquid celluloid to permeate said textile material.

2. The herein described method of making an insole, which consists in liquefying one side of a layer of celluloid, forming a layer of textile material with a crease, placing a strip of fibrous material in said crease, and pressing the liquefied side of Ysaid celluloid against the'textile material and the strip to cause the liquid celluloid to permeate said textile material and said strip.

3. The herein-described method of making an insole, which consists in liquefying one side of-a layer of celluloid, forming a nio side of said flexible material away from said' rib to cause the celluloid to stick thereto.

4. The herein-described method of making an insole, whichconsist's in liquefying one side of a layer of celluloid, forming a crease in a layer of suitable flexible'material, placing a strip of reinforcing material in said crease, and pressingA the liquefied side ofz,

said celluloid against the side of said flexible material from which said crease opens' to cause." said celluloid to stick tosaid flexible material and inclose said4 reinforcing strip In testimony whereof Witnesses W.' P1. ABELL,

P. W. PEzzE'rrI.

. encuen L. PREBLE. T 

